package com.yy;

public class demo03 {
    public static void main(String[] args) {
        int r = 1;
        double pai = 3.14;
        while (pai * r * r < 50) {
            System.out.println("圆的半径为：" + r + "  " + "圆的面积为：" + pai * r * r);
            r++;
        }
    }
}